
PRELIMINARY
CYV15G0404DXB
Document #: 38-02097 Rev. **
Page 11 of 43
LFIA
LFIB
LFIC
LFID
LVTTL Output,
asynchronous
Link Fault Indication Output
. LFIx is an output status indicator signal. LFIx is the
logical OR of five internal conditions. LFIx is asserted LOW when any of the
following conditions is true:
Received serial data rate outside expected range
Analog amplitude below expected levels
Transition density lower than expected
Receive channel disabled
ULCx is LOW
Absence of REFCLKx±.
Device Configuration and Control Bus Signals
WREN
LVTTL input,
asynchronous,
internal pull-up
ADDR[3:0]
LVTTL input
asynchronous,
internal pull-up
Control Write Enable
. The WREN input writes the values of the DATA[7:0] bus
into the latch specified by the address location on the ADDR[3:0] bus.
[5]
Control Addressing Bus
. The ADDR[3:0] bus is the input address bus used to
configure the device. The WREN input writes the values of the DATA[7:0] bus into
the latch specified by the address location on the ADDR[3:0] bus.
[5]
Table 9
lists
the configuration latches within the device, and the initialization value of the
latches upon the assertion of RESET.
Table 10
shows how the latches are
mapped in the device.
Control Data Bus
. The DATA[7:0] bus is the input data bus used to configure the
device. The WREN input writes the values of the DATA[7:0] bus into the latch
specified by address location on the ADDR[3:0] bus.
[5 ]
Table 9
lists the configu-
ration latches within the device, and the initialization value of the latches upon the
assertion of RESET.
Table 10
shows how the latches are mapped in the device.
DATA[7:0]
LVTTL input
asynchronous,
internal pull-up
Internal Device Configuration Latches
RFMODE[A..D][1:0]
FRAMCHAR[A..D]
DECMODE[A..D]
DECBYP[A..D]
RXCKSEL[A..D]
RXRATE[A..D]
SDASEL[A..D][1:0]
ENCBYP[A..D]
TXCKSEL[A..D]
TXRATE[A..D]
RFEN[A..D]
RXPLLPD[A..D]
RXBIST[A..D]
TXBIST[A..D]
OE2[A..D]
OE1[A..D]
PABRST[A..D]
GLEN[11..0]
FGLEN[2..0]
Factory Test Modes
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Internal Latch
[6]
Reframe Mode Select
.
Framing Character Select
.
Receiver Decoder Mode Select
.
Receiver Decoder Bypass
.
Receive Clock Select
.
Receive Clock Rate Select
.
Signal Detect Amplitude Select
.
Transmit Encoder Bypassed
.
Transmit Clock Select
.
Transmit PLL Clock Rate Select
.
Reframe Enable
.
Receive Channel Power Control
.
Receive Bist Disabled
.
Transmit Bist Disabled
.
Differential Serial Output Driver 2 Enable
.
Differential Serial Output Driver 1 Enable
.
Transmit Clock Phase Alignment Buffer Reset
.
Global Latch Enable
.
Force Global Latch Enable
.
Note:
6.
See
Device Configuration and Control Interface
for detailed information on the internal latches.
Pin Definitions
(continued)
CYV15G0404DXB Quad HOTLink II Transceiver
Name
I/O Characteristics
Signal Description